bucket crud

utils/pagination.go

@@ -0,0 +1,14 @@
+package utils
+
+// Paginate returns a slicle with offset & limit
+func Paginate[T any](items []T, offset, limit int) []T {
+	if len(items) <= offset {
+		return []T{}
+	}
+
+	if limit > len(items)-offset {
+		limit = len(items) - offset
+	}
+
+	return items[offset : offset+limit]
+}

utils/pagination_test.go

@@ -0,0 +1,37 @@
+package utils
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+func TestPagination(t *testing.T) {
+
+	cases := []struct {
+		Slice    []int
+		Offset   int
+		Limit    int
+		Expected []int
+	}{
+		{
+			Slice:    []int{1, 2, 3, 4, 5},
+			Offset:   1,
+			Limit:    4,
+			Expected: []int{2, 3, 4, 5},
+		},
+	}
+	for _, tc := range cases {
+		t.Run(
+			fmt.Sprintf("%v %d %d %v", tc.Slice, tc.Offset, tc.Limit, tc.Expected),
+			func(t *testing.T) {
+				got := Paginate(tc.Slice, tc.Offset, tc.Limit)
+
+				if !reflect.DeepEqual(got, tc.Expected) {
+					t.Errorf("Expected %v, but got %v", tc.Expected, got)
+				}
+
+			})
+	}
+
+}